Finding relevant index words can be very helpful in finding relevant results or while refining searches.
To find relevant index words, click on relevant clusters, and the relevance bars of index words will be updated, and finally index words will be sorted by relevance. Relevance bars of results are also updated and sorted by relevance.
You can also mark relevant results and then sort words by relevance. Index words with red relevance bars are in marked results, those with blue bars are not in marked results but may still be relevant.